MapGraphics/MapGraphicsScene.cpp at master · Polytech-VM-Team/MapGraphics · GitHub

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#include "MapGraphicsScene.h"

#include <QtDebug>


MapGraphicsScene::MapGraphicsScene(QObject * parent)
    : QObject(parent)
{
}

MapGraphicsScene::~MapGraphicsScene()
{
    foreach(MapGraphicsObject * obj, _objects)
        this->removeObject(obj);
}

void MapGraphicsScene::addObject(MapGraphicsObject *object)
{
    if (object == 0)
        return;

    object->setConstructed();

    connect(object,
            SIGNAL(newObjectGenerated(MapGraphicsObject*)),
            this,
            SLOT(handleNewObjectGenerated(MapGraphicsObject*)));
    connect(object,
            SIGNAL(destroyed(QObject*)),
            this,
            SLOT(handleObjectDestroyed(QObject*)));

    _objects.insert(object);
    this->objectAdded(object);
}

QList<MapGraphicsObject *> MapGraphicsScene::objects() const
{
    QList<MapGraphicsObject *> toRet;

    return toRet;
}

void MapGraphicsScene::removeObject(MapGraphicsObject *object)
{
    _objects.remove(object);
    this->objectRemoved(object);
}

//private slot
void MapGraphicsScene::handleNewObjectGenerated(MapGraphicsObject *newObject)
{
    this->addObject(newObject);
}

//private slot
void MapGraphicsScene::handleObjectDestroyed(QObject *object)
{
    /*
      We have to be careful with this casted pointer as technically at this point the MapGraphicsObject
      portion of it has been destroyed. This signal comes from the QObject destructor.
    */
    MapGraphicsObject *mgObj = (MapGraphicsObject*)object;

    this->removeObject(mgObj);
}